Why NIPT starts at 10 weeks, how gestational age affects fetal fraction, and how to plan timing around the dating scan and confirmatory options.
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The difference between sensitivity, specificity and positive predictive value in NIPT, and why a high-risk result is often not what it appears.
What non-invasive prenatal testing screens for, when it can be taken, how accurate it really is and why it is a screening test rather than a diagnosis.
What a low-risk or negative NIPT result actually rules out, what it does not, and which parts of antenatal care still matter afterwards.
A scan-by-scan guide to pregnancy ultrasound in Bangkok: dating, nuchal translucency, anomaly and growth scans, and what each one can and cannot detect.
What a high-risk NIPT result means, why it is not a diagnosis, what confirmatory testing involves and how to think through the decisions that follow.
How non-invasive prenatal paternity testing uses cell-free DNA, when it can be done, what affects reliability and what to verify before booking.
Why NIPT sometimes uncovers findings relating to the mother rather than the pregnancy, how often this happens, and what follow-up involves.
How NIPT performs in twin pregnancies, what a vanishing twin does to the result, and what to tell the laboratory about IVF, donor eggs or surrogacy.
What fetal fraction is, why a NIPT sample can return no result, what raises and lowers it, and why repeated failure is itself clinically meaningful.